1   /**
2    * Copyright (c) 2000-2009 Liferay, Inc. All rights reserved.
3    *
4    * Permission is hereby granted, free of charge, to any person obtaining a copy
5    * of this software and associated documentation files (the "Software"), to deal
6    * in the Software without restriction, including without limitation the rights
7    * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
8    * copies of the Software, and to permit persons to whom the Software is
9    * furnished to do so, subject to the following conditions:
10   *
11   * The above copyright notice and this permission notice shall be included in
12   * all copies or substantial portions of the Software.
13   *
14   * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
15   * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
16   * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
17   * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
18   * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
19   * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
20   * SOFTWARE.
21   */
22  
23  package com.liferay.portal.kernel.messaging;
24  
25  import com.liferay.portal.kernel.log.Log;
26  import com.liferay.portal.kernel.log.LogFactoryUtil;
27  import com.liferay.portal.kernel.messaging.sender.MessageSender;
28  import com.liferay.portal.kernel.messaging.sender.SingleDestinationMessageSender;
29  
30  /**
31   * <a href="BaseMessageListener.java.html"><b><i>View Source</i></b></a>
32   *
33   * @author Michael C. Han
34   */
35  public abstract class BaseMessageListener implements MessageListener {
36  
37      public BaseMessageListener(
38          SingleDestinationMessageSender statusSender,
39          MessageSender responseSender) {
40  
41          _statusSender = statusSender;
42          _responseSender = responseSender;
43      }
44  
45      public void receive(Message message) {
46          MessageStatus messageStatus = new MessageStatus();
47  
48          messageStatus.startTimer();
49  
50          try {
51              doReceive(message, messageStatus);
52          }
53          catch (Exception e) {
54              _log.error(
55                  "Unable to process request " + message.getDestinationName(), e);
56  
57              messageStatus.setException(e);
58          }
59          finally {
60              messageStatus.stopTimer();
61  
62              _statusSender.send(messageStatus);
63          }
64      }
65  
66      protected abstract void doReceive(
67              Message message, MessageStatus messageStatus)
68          throws Exception;
69  
70      protected MessageSender getResponseSender() {
71          return _responseSender;
72      }
73  
74      private static Log _log = LogFactoryUtil.getLog(BaseMessageListener.class);
75  
76      private MessageSender _responseSender;
77      private SingleDestinationMessageSender _statusSender;
78  
79  }